High strength, high capacity filter media and structure
AssigneeDonaldson Company, Inc.
InventorsKeh Dema, Linda Olson
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Abstract
In the filtration of fluid materials, the removal of particulate from the moving stream requires substantial pressure to maintain flow and substantial capacity for removing particulate. The filters of the invention are rugged, high wet strength materials having a basis weight, permeability and efficiency suitable to obtain substantial reduction in particulate loading from liquid streams without plugging or mechanical failure. In particular, the filters of the invention permit the removal of substantial proportions of particulate from non-aqueous streams including lubricant oils, hydraulic fluids and other contaminated streams.
Claims14
A method of filtering a liquid the method comprises passing a liquid having a particulate load through a filter medium comprising a layer 5% to 50 wt % of a bicomponent binder fiber, about 50 to 95 wt % of a media fiber, about 0.5 to 25 wt % of a binder resin, the layer having a basis weight of about 30 to 250 g-m−2;
- wherein provides a permeability of 10 to 40 ft-min−1, a wet bursting strength of about up to 50 lb-in−2 and removing the particulate load.
Dependencies are inferred from the claim text.